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ACQUISITIONS AND INVESTMENTS - Cyco (Details) - USD ($)
$ in Millions
Apr. 28, 2022
Jul. 02, 2022
Sep. 30, 2021
Jul. 03, 2021
Business Acquisition [Line Items]        
Goodwill   $ 254.7 $ 605.2 $ 547.1
Hawthorne        
Business Acquisition [Line Items]        
Goodwill   $ 0.0 $ 350.2  
Cyco        
Business Acquisition [Line Items]        
Contingent consideration, maximum payout $ 10.0      
Cyco | Hawthorne        
Business Acquisition [Line Items]        
Consideration for the acquisition 37.4      
Contingent consideration, liability 3.1      
Inventory and other current assets 1.3      
Finite-lived intangible assets acquired 10.5      
Goodwill $ 25.6      
Cyco | Hawthorne | Minimum        
Business Acquisition [Line Items]        
Intangible assets amortization period 5 years      
Cyco | Hawthorne | Maximum        
Business Acquisition [Line Items]        
Intangible assets amortization period 25 years